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TIL: Horseshoe crabs are vital for the survival of migratory birds. As migratory birds fly from South America to nesting sites in the Arctic, they stop in the Mid-Atlantic to "re-fuel" on freshly-spawned horseshoe crab eggs.

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b9yo9 TIL four new species of epaulette walking sharks were recently discovered off the coast of Australia and Papua New Guinea which are able to travel short distances over land because of their ability to walk using their pectoral fins and live in low to no oxygen conditions for extended periods of time
vPmpB TIL that the Proust Phenomenon describes how odors can trigger vivid and emotional memories more effectively than other sensory cues.
DQdae Today I learned of dark lightning, known also as Terrestrial gamma-ray flash (TGF). Dark lightning discharges from storm clouds and flings antimatter into space.
4XGnR TIL the lifespan of the first generation of postal pilots was around 900 flight hours. The job was so dangerous that 35 of the first 40 pilots hired died in crashes, leading to the nickname 'The Suicide Club'.
X69P TIL that claiming you panicked because of an unwanted homosexual advance is a legitimate defense against a murder charge in Australia